Commonwealth legislation

AD/LYC/107 Amdt 2 - Crankshaft Replacement

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators to replace specified Lycoming TIO‑540 and LTIO‑540 crankshafts, and certain IO‑540 crankshafts fitted with STC‑approved turbochargers, in accordance with Textron Lycoming MSB 552. Installed engines must be grounded within five hours of the directive; spare engines must be removed before installation. The action follows a manufacturer‑reported crankshaft material defect and places replacement cost, downtime and compliance verification on aircraft owners/operators.

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Direct links to the current provisions in AD/LYC/107 Amdt 2 - Crankshaft Replacement.

Lycoming Piston Engines

AD/LYC/107 Amdt 2 (continued)

Requirement: 1. MSB 552 listed TIO-540 and LTIO-540 engines: Replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

2. MSB 552 listed TIO-540 and LTIO-540 crankshafts: Replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

3. IO-540 series engines incorporating an turbocharger STC:

Determine the serial number of the crankshaft; and

b. If listed in Table 2 of Textron Lycoming MSB 552, replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

Note 2: Prior replacement of a crankshaft in accordance with either MSB 550 or 552 constitutes compliance with the requirements of this directive.

Note 3: FAA Airworthiness Directive 2002-19-03 Amdt 39-12883 refers.

Compliance: Unless previously accomplished:

Installed engines: Within 5 hours time in service from the effective date of this Directive.

b. Spare engines: Before installation in an aircraft. This Amendment becomes effective on 2 October 2002.

Background: This Directive was originally issued to require certain crankshafts to be removed from service. The requirement follows advice from the engine manufacturer of a crankshaft material defect being identified in the investigation of a number of engine failures. This amendment increases the engines applicable to include IO-540 engines incorporating an STC approved turbocharger.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

Lycoming Piston Engines Lycoming Piston Engines

Lycoming Piston Engines

AD/LYC/107 Amdt 2 (continued)

Requirement: 1. MSB 552 listed TIO-540 and LTIO-540 engines: Replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

2. MSB 552 listed TIO-540 and LTIO-540 crankshafts: Replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

3. IO-540 series engines incorporating an turbocharger STC:

Determine the serial number of the crankshaft; and

b. If listed in Table 2 of Textron Lycoming MSB 552, replace the crankshaft in accordance with the requirements of Textron Lycoming MSB 552.

Note 2: Prior replacement of a crankshaft in accordance with either MSB 550 or 552 constitutes compliance with the requirements of this directive.

Note 3: FAA Airworthiness Directive 2002-19-03 Amdt 39-12883 refers.

Compliance: Unless previously accomplished:

Installed engines: Within 5 hours time in service from the effective date of this Directive.

b. Spare engines: Before installation in an aircraft. This Amendment becomes effective on 2 October 2002.

Lycoming Piston Engines Lycoming Piston Engines

Lycoming Piston Engines

AD/LYC/107 Amdt 2 (continued)

Amendment 1 of this Airworthiness Directive became effective on 21 August 2002.

The original issue of this Airworthiness Directive became effective on 20 February 2002.

James Coyne

Delegate of the Civil Aviation Safety Authority 26 September 2002

The above AD is notified in the Commonwealth of Australia Gazette on 2 October 2002.